I don't like to cage mist/spray as everything gets soaked and cages can rust too easily even powder coated. Our first attempt at a bath for Rio was a 2' square shallow tray large Macaw size and we placed it on the living room floor and put in about an inch deep of tepid water, well he loved it, not so much us though! water went every where, talk about cages getting we when mist/spraying the living room was far worse off after his bath. We needed another option.
I constructed a shower perch as we have a large walk in shower and this is how his shower time ritual goes,
He steps onto my hand from his cage perch we go through the living room door, slowly, as those doors are quite scary, up the stairs and into the bathroom I then have to put the scary door into the hole and once that has gone all is ok, I put the lid down on the toilet (for safety) I then place Rio on top of the shower cubicle while I prepare his shower. Moving his shower perch (which is attached with suckers) across the middle of the shower and then running the water though till it's tepid (our water is fed from tanks and not heated as used so there is no risk of hot water scalding, apart from anything I'm constantly monitoring direction temperature and pressure) Whilst all this is going on Mr Rio is running around the top of the cubicle testing all the top with his beak then moving around to the mirror to say hello to the other bird also about to take a shower, if I haven't moved all human shower gel and shampoo containers out the way before hand these all have to be chucked on the floor.
Anyway as soon as the water comes on it's W-hey wings out get me on my perch I lift him to his perch then direct the water on to him the shower head mists or showers he seems to prefer the shower rather like rainfall he has a good soaking his body language tells me when he's had enough and I lift back onto the cubicle top where a good old flap gets some of the water off then back downstairs to his cage perch and he has a blow dry from a small fan heater on low which he absolutely loves I don't dry him completely I let him do the natural preening to finish off, just make sure he doesn't get chilled at this time of year. I love the feel of his feathers after a shower and they shine even more.
The first few times he was a bit unsure until he got used as with all new things but now Sunday is a ritual and also mid week, if we get the chance.
Those doors are another thing.